Thomas de Clare, Lord of Thomond

Thomas de Clare, Lord of Thomond (1245-29 August 1287) was Lord of Thomond from 1276 to 1287, preceding Gilbert de Clare, Lord of Thomond.

Biography
Thomas de Clare was the son of Richard de Clare, 6th Earl of Gloucester and Maud de Lacy, and he was the brother of Gilbert de Clare, 7th Earl of Gloucester. In 1276, he was granted the lordship of Thomond in Ireland by King Edward I of England, and De Clare and Geoffrey de Geneville commanded a Norman army against the Irish clans of County Wicklow that same year. However, they were soundly defeated at Glenmalure, suffering heavy losses. De Clare also intervened in local wars between rival Irish lords, including the O'Brien family. He died in 1287, and he was succeeded by his son Gilbert.